X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Floaderaction.h;h=a6eb552e981e38f329ab626c34d2cae9c7afc504;hb=e4beb0453a1cfe200fc97607afab94c3ddee1c65;hp=ff478ec2df7aa8ed651914922516781e3f519278;hpb=db9c49893c2a9475cb5efa4a53bc481a5f66231f;p=libs%2Fdatafile.git

diff --git a/source/loaderaction.h b/source/loaderaction.h
index ff478ec..a6eb552 100644
--- a/source/loaderaction.h
+++ b/source/loaderaction.h
@@ -1,10 +1,3 @@
-/* $Id$
-
-This file is part of libmspdatafile
-Copyright © 2006-2008  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #ifndef MSP_DATAFILE_LOADERACTION_H_
 #define MSP_DATAFILE_LOADERACTION_H_
 
@@ -21,14 +14,15 @@ Base class for loader actions.
 */
 class LoaderAction
 {
-public:
-	/**
-	Called when a statement is to be loaded.
-	*/
-	virtual void execute(Loader &, const Statement &) const=0;
-	virtual ~LoaderAction() { }
 protected:
 	LoaderAction() { }
+public:
+	virtual ~LoaderAction() { }
+
+	/** Called to process a statement. */
+	virtual void execute(Loader &, const Statement &) const = 0;
+
+	virtual std::string get_signature() const = 0;
 };
 
 
@@ -38,17 +32,21 @@ Loads a statement by calling a function that takes no arguments.
 template<typename L>
 class LoaderFunc0: public LoaderAction
 {
-public:
+private:
 	typedef void (L::*FuncType)();
 
+	FuncType func;
+
+public:
 	LoaderFunc0(FuncType f): func(f) { }
-	void execute(Loader &l, const Statement &st) const
+
+	virtual void execute(Loader &l, const Statement &) const
 	{
-		if(st.args.size()!=0) throw TypeError("Wrong number of arguments");
 		(dynamic_cast<L &>(l).*func)();
 	};
-private:
-	FuncType func;
+
+	virtual std::string get_signature() const
+	{ return std::string(); }
 };
 
 
@@ -58,17 +56,21 @@ Loads a statement by calling a function that takes one argument.
 template<typename L, typename A0>
 class LoaderFunc1: public LoaderAction
 {
-public:
+private:
 	typedef void (L::*FuncType)(A0);
 
+	FuncType func;
+
+public:
 	LoaderFunc1(FuncType f): func(f) { }
-	void execute(Loader &l, const Statement &st) const
+
+	virtual void execute(Loader &l, const Statement &st) const
 	{
-		if(st.args.size()!=1) throw TypeError("Wrong number of arguments");
 		(dynamic_cast<L &>(l).*func)(st.args[0].get<A0>());
 	}
-private:
-	FuncType func;
+
+	virtual std::string get_signature() const
+	{ return std::string(1, TypeInfo<A0>::signature); }
 };
 
 
@@ -78,20 +80,30 @@ Loads a statement by calling a function that takes an array of values.
 template<typename L, typename A0>
 class LoaderFunc1<L, const std::vector<A0> &>: public LoaderAction
 {
-public:
+private:
 	typedef void (L::*FuncType)(const std::vector<A0> &);
 
+	FuncType func;
+
+public:
 	LoaderFunc1(FuncType f): func(f) { }
-	void execute(Loader &l, const Statement &st) const
+
+	virtual void execute(Loader &l, const Statement &st) const
 	{
 		std::vector<A0> values;
 		values.reserve(st.args.size());
-		for(ValueArray::const_iterator i=st.args.begin(); i!=st.args.end(); ++i)
+		for(Statement::Arguments::const_iterator i=st.args.begin(); i!=st.args.end(); ++i)
 			values.push_back(i->get<A0>());
 		(dynamic_cast<L &>(l).*func)(values);
 	}
-private:
-	FuncType func;
+
+	virtual std::string get_signature() const
+	{
+		std::string result;
+		result += TypeInfo<A0>::signature;
+		result += '*';
+		return result;
+	}
 };
 
 
@@ -101,139 +113,203 @@ Loads a statement by calling a function with the statement itself as argument.
 template<typename L>
 class LoaderFunc1<L, const Statement &>: public LoaderAction
 {
-public:
+private:
 	typedef void (L::*FuncType)(const Statement &);
 
+	FuncType func;
+
+public:
 	LoaderFunc1(FuncType f): func(f) { }
-	void execute(Loader &l, const Statement &st) const
+
+	virtual void execute(Loader &l, const Statement &st) const
 	{
 		(dynamic_cast<L &>(l).*func)(st);
 	}
-private:
-	FuncType func;
+
+	virtual std::string get_signature() const
+	{ return "*"; }
 };
 
 
 template<typename L, typename A0, typename A1>
 class LoaderFunc2: public LoaderAction
 {
-public:
+private:
 	typedef void (L::*FuncType)(A0, A1);
 
+	FuncType func;
+
+public:
 	LoaderFunc2(FuncType f): func(f) { }
-	void execute(Loader &l, const Statement &st) const
+
+	virtual void execute(Loader &l, const Statement &st) const
 	{
-		if(st.args.size()!=2) throw TypeError("Wrong number of arguments");
 		(dynamic_cast<L &>(l).*func)(st.args[0].get<A0>(), st.args[1].get<A1>());
 	}
-private:
-	FuncType func;
+
+	virtual std::string get_signature() const
+	{
+		std::string result;
+		result += TypeInfo<A0>::signature;
+		result += TypeInfo<A1>::signature;
+		return result;
+	}
 };
 
 
 template<typename L, typename A0, typename A1, typename A2>
 class LoaderFunc3: public LoaderAction
 {
-public:
+private:
 	typedef void (L::*FuncType)(A0, A1, A2);
 
+	FuncType func;
+
+public:
 	LoaderFunc3(FuncType f): func(f) { }
-	void execute(Loader &l, const Statement &st) const
+
+	virtual void execute(Loader &l, const Statement &st) const
 	{
-		if(st.args.size()!=3) throw TypeError("Wrong number of arguments");
 		(dynamic_cast<L &>(l).*func)(st.args[0].get<A0>(), st.args[1].get<A1>(), st.args[2].get<A2>());
 	}
-private:
-	FuncType func;
+
+	virtual std::string get_signature() const
+	{
+		std::string result;
+		result += TypeInfo<A0>::signature;
+		result += TypeInfo<A1>::signature;
+		result += TypeInfo<A2>::signature;
+		return result;
+	}
 };
 
 
 template<typename L, typename A0, typename A1, typename A2, typename A3>
 class LoaderFunc4: public LoaderAction
 {
-public:
+private:
 	typedef void (L::*FuncType)(A0, A1, A2, A3);
 
+	FuncType func;
+
+public:
 	LoaderFunc4(FuncType f): func(f) { }
-	void execute(Loader &l, const Statement &st) const
+
+	virtual void execute(Loader &l, const Statement &st) const
 	{
-		if(st.args.size()!=4) throw TypeError("Wrong number of arguments");
 		(dynamic_cast<L &>(l).*func)(st.args[0].get<A0>(), st.args[1].get<A1>(), st.args[2].get<A2>(), st.args[3].get<A3>());
 	}
-private:
-	FuncType func;
+
+	virtual std::string get_signature() const
+	{
+		std::string result;
+		result += TypeInfo<A0>::signature;
+		result += TypeInfo<A1>::signature;
+		result += TypeInfo<A2>::signature;
+		result += TypeInfo<A3>::signature;
+		return result;
+	}
 };
 
 
 template<typename L, typename A0, typename A1, typename A2, typename A3, typename A4>
 class LoaderFunc5: public LoaderAction
 {
-public:
+private:
 	typedef void (L::*FuncType)(A0, A1, A2, A3, A4);
 
+	FuncType func;
+
+public:
 	LoaderFunc5(FuncType f): func(f) { }
-	void execute(Loader &l, const Statement &st) const
+
+	virtual void execute(Loader &l, const Statement &st) const
 	{
-		if(st.args.size()!=5) throw TypeError("Wrong number of arguments");
 		(dynamic_cast<L &>(l).*func)(st.args[0].get<A0>(), st.args[1].get<A1>(), st.args[2].get<A2>(), st.args[3].get<A3>(), st.args[4].get<A4>());
 	}
-private:
-	FuncType func;
+
+	virtual std::string get_signature() const
+	{
+		std::string result;
+		result += TypeInfo<A0>::signature;
+		result += TypeInfo<A1>::signature;
+		result += TypeInfo<A2>::signature;
+		result += TypeInfo<A3>::signature;
+		result += TypeInfo<A4>::signature;
+		return result;
+	}
 };
 
 
 template<typename L, typename T0>
 class LoadValue1: public LoaderAction
 {
-public:
+private:
 	typedef T0 L::*Pointer0Type;
 
+	Pointer0Type ptr0;
+
+public:
 	LoadValue1(Pointer0Type p0): ptr0(p0) { }
-	void execute(Loader &l, const Statement &st) const
+
+	virtual void execute(Loader &l, const Statement &st) const
 	{
-		if(st.args.size()!=1) throw TypeError("Wrong number of arguments");
-		dynamic_cast<typename L::Loader &>(l).get_object().*ptr0=st.args[0].get<T0>();
+		dynamic_cast<typename L::Loader &>(l).get_object().*ptr0 = st.args[0].get<T0>();
 	}
-private:
-	Pointer0Type ptr0;
+
+	virtual std::string get_signature() const
+	{ return std::string(1, TypeInfo<T0>::signature); }
 };
 
 
 template<typename L, typename T0>
 class LoadValue1<L, T0 *>: public LoaderAction
 {
-public:
+private:
 	typedef T0 *L::*Pointer0Type;
 
+	Pointer0Type ptr0;
+
+public:
 	LoadValue1(Pointer0Type p0): ptr0(p0) { }
-	void execute(Loader &l, const Statement &st) const
+
+	virtual void execute(Loader &l, const Statement &st) const
 	{
-		if(st.args.size()!=1) throw TypeError("Wrong number of arguments");
-		typename L::Loader &ldr=dynamic_cast<typename L::Loader &>(l);
-		ldr.get_object().*ptr0=ldr.get_collection().template get<T0>(st.args[0].get<std::string>());
+		typename L::Loader &ldr = dynamic_cast<typename L::Loader &>(l);
+		ldr.get_object().*ptr0 = ldr.get_collection().template get<T0>(st.args[0].get<std::string>());
 	}
-private:
-	Pointer0Type ptr0;
+
+	virtual std::string get_signature() const
+	{ return std::string(1, TypeInfo<std::string>::signature); }
 };
 
 
 template<typename L, typename T0, typename T1>
 class LoadValue2: public LoaderAction
 {
-public:
+private:
 	typedef T0 L::*Pointer0Type;
 	typedef T1 L::*Pointer1Type;
 
+	Pointer0Type ptr0;
+	Pointer1Type ptr1;
+
+public:
 	LoadValue2(Pointer0Type p0, Pointer1Type p1): ptr0(p0), ptr1(p1) { }
-	void execute(Loader &l, const Statement &st) const
+
+	virtual void execute(Loader &l, const Statement &st) const
 	{
-		if(st.args.size()!=2) throw TypeError("Wrong number of arguments");
-		dynamic_cast<typename L::Loader &>(l).get_object().*ptr0=st.args[0].get<T0>();
-		dynamic_cast<typename L::Loader &>(l).get_object().*ptr1=st.args[1].get<T1>();
+		dynamic_cast<typename L::Loader &>(l).get_object().*ptr0 = st.args[0].get<T0>();
+		dynamic_cast<typename L::Loader &>(l).get_object().*ptr1 = st.args[1].get<T1>();
+	}
+
+	virtual std::string get_signature() const
+	{
+		std::string result;
+		result += TypeInfo<T0>::signature;
+		result += TypeInfo<T1>::signature;
+		return result;
 	}
-private:
-	Pointer0Type ptr0;
-	Pointer1Type ptr1;
 };
 
 } // namespace DataFile